Rental car Company who cleans their cars?

How do rental car companies maintain cleanliness of their automobiles.





Do their salesmen ect do it or do they hire someone that his/her job is just to clean the cars?Rental car Company who cleans their cars?
When they are returned, they have their own people vacuum, clean windows, check oil, etc. They all have a car wash they run it through before the next rental tooRental car Company who cleans their cars?
assuming that they do make good money renting their cars they may just do heavy cleaning themselves i mean the car is really never in possesion for more than a week or they may take it to a cleaning/detail place. but since that costs more i assume they do most themselves
From my personal experience... some kid making $7.00 an hour. I've never had a really clean one. I've found other's personal belongings, cigarette ashes, streaky windows, etc.
Most rental companies have people on site that clean the vehicles as soon as they come in.